public class O10 {
    public static void main(String[] args) {
        O10 o = new O10();
        System.out.println(o.fib(100));
    }
    public int fib(int n) {
        if (n==0)
            return 0;
        if (n==1)
            return 1;
        n++;
        int[] dp = new int[n];
        dp[0] = 0;
        dp[1] = 1;
        for (int i = 2; i < n; i++) {
            dp[i] = (dp[i-1]+dp[i-2])%1000000007;
        }
        return dp[dp.length-1];
    }
}
